Sectional coal-auger nut.



PATENTED OCT. 11, 1904.

J. H. MASON. SEGTIONAL GOAL AUGER NUT.

APPLICATION FILED MAR. 5. 1904.

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BY QWq Qm.

ATTORNEY8 UNTTEE STATES JULIUS H. MASON, OF DUNCAN FALLS, OHIO, ASSIGNOROF ONE-HALF Patented October 11, 1904.

PATENT ()FFICE; I

TO SPENCER M. GARRETT, OF PHILO, OHIO.

SECTIONAL COA L-AUGER NUT.

SPECIFICATION forming part of Letters Patent N0. 771,827, dated October11, 1904:.

Application filed March 5, 1904.

To all whmn it may concern:

Be it known that I, J ULIUs H. MAsoN, a citizen of the United States,residing at Duncan Falls, in the county of Muskingum and State of Ohio,have invented a certain new and useful Improvement in SectionalOoahAuger Nuts, of which the following is a specification.

My invention relates to the improvement of open nuts or boxings forcoal-angers or augers of that class which are adapted for use in boringinto coal or similar minerals.

The objects of my invention are to provide an improved construction ofauger-nut of this class wherein means are provided for compensating forthewear on the nut and whereby a strong and durable nut is providedwhich obviates the employment of separately-formed keys or other loosefastening devices and to produce other improvements the details ofconstruction of which will be more fully pointed out hereinafter.

These objects I accomplish in the manner, illustrated in theaccompanying drawings, in Which Figure 1 is a view in elevation of myimproved nut, showing a portion of an-auger screw-shank therein. Fig. 2is a plan view of the nut, showing the same in its locked or closedposition. Fig. 3 is a detail sectional view on line at m of Fig. 1. Fig.4 is a side elevation of the nut with the locking-lever removed. Fig. 5is a sectional view on line yg of Fig. 2, and Fig. 6 is a similarsectional view showing the position of the locking-lever when the partsare in the unlocked positions.

Similar numerals refer to similar parts throughout the several views.

1 and 2 represent, respectively, the two halfcylindrical opposinginternally-threaded sections which form the nut-body, these sectionsbeing hinged or jointedly connected through the medium of pivoted orhinged arms 3 and 4:, which project from corresponding sides of saidnut-sections. W'th the hinge-arm 4 of the section 2 is formed one of theoutwardlyextending nut-supporting trunnions 5, and from theopposite sideof the section 2 projects the opposing trunnion 6. As indicated in thedrawings, and more clearly in Fig. 4, the

Serial No. 196,656. (No model.)

base or inner end portion of the trunnion 6 is enlarged to form apartially circular external shoulder 7 and adjacent to the latter saidtrunnion is provided with a desirable number of screw-threads 8.

In producing the nut-section 1 the latter has formed therewith at thecenter of its length, on what we will term its forward side, anoutwardly-projecting lug 9, which, as shown, is in the nature of acamprojection and which has one of its side faces formed substantiallyvertical, as shown. The opposing side face and top of the lug presents asuitablycurved surface, as shown.

11 represents a cam-lever which I employ in the manner hereinafterdescribed in adjustably locking said nut-sections in proper engagementwith each other. This lever, which is in the nature of an elongatedlinkbody, as shown, is formed with an enlarged cam-head portion 11, thecenter of which is out of longitudinal alinement with the center of theelongated handle portion 11 thereof. The head portion 11 is formed withan opening 12, which is central of said head, although the mouth of saidopening or the inner face recess leading to said month, which isindicated at 11", has its wall in the form of a spiral curve, as shownmore clearly in Figs. 5 and 6. As indicated in the drawings, thetrunnion 0r pin 6 is adapted to have its shoulder portion 7 containedwithin the spiral-walled recess of the lever-head, said lever beingmaintained in its position on the trunnion enlargement or shoulder bymeans of a suitably-formed nut 13, which engages the threads 8 of theinner portion of the trunnion. When thus mounted and the handle portionof the lever is raised to the vertical or substantially verticalposition, it is obvious that the member or section 1 of the nut isadapted to be raised or moved outward from the section 2 on its hinge,the cam projection 9 in this operation being free to move outwardthrough the mouth of the recess 11 which leads into the handle portionor yoke 11. It will be observed, however, that when the nut-sections aretogether and are made to embrace the screw-threaded shank 15 of theboring-auger said nut-sections may be locked in engagement one with theother by turning downward the lever 11, which will result, as willreadily be understood, in a gradually-increased binding of the innerspirally-curved wall of the recess 11 and the curved surfaces of the lug9 and shoulder 7, this binding or frictional locking of the partsserving to insure the clamping of the nut-sections in proper engagementwith the threaded auger stem or shank. As the nut or the internalthreads of the sections thereof become worn such wear may be compensatedfor, as will be readily understood, by a further turning of the leverand whereby said nu t-sections are again moved into desirable contactwith the threads of the auger-stem.

Heretofore it has been customary to provide various means for lockingthe sections of an open nut or boxing of the character described inwhich separately-formed keys and other similar devices have beenutilized; but by the construction herein shown and described it will beunderstood that a comparatively simple locking means is provided whichobviates the necessity of employing any loose keys or other disconnectedparts and which provides a ready means for adjusting the relativepositions of the nut-sections, and thereby compensating for such wear assaid sections may be subjected to.

Having now fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a sectional coal-auger nut, the combination with the hingednut-sections 1 and 2, one of said sections having opposing trunnions andthe other a cam-lug, of a lever rotatably mounted on one of saidtrunnions and recessed to embrace the base of the trunnion and saidcam-lug.

2. In a sectional coal-auger nut, the combination with the hingednut-sections 1 and 2, said sections having opposing trunnions and theremaining section having a cam-lug projection, of a lever comprisinghandle and head portions, said head having an opening therethroughadapted to receive one of the trunnions, and having its inner facerecessed, the wall of said recess describing a spiral curve.

JULIUS H. MASON.

In presence of FRED BURNS, ANns L. FORAKER.

